ltc3880euj polyphase step-down dc/dc converter with
TRANSCRIPT
1Rev. B
DEMO MANUAL DC1740A
DESCRIPTION
LTC3880EUJPolyPhase Step-Down DC/DC Converter with Digital Power System Management
Demonstration circuit 1740A is a PolyPhase® synchronous buck converter featuring the LTC®3880EUJ, a dual-phase current mode controller with PMBus interface and digital power system management functions. There are two ver-sions of the boards available:
• DC1740A-A: 4-phase single-output configuration. Default output setting VOUT0 = 1.2V/80A
• DC1740A-B: 3+1-phase dual-output configuration. De-fault output setting VOUT0 = 1.5V/20A, VOUT1 = 1.2V/60A
The DC1740A powers up to default settings and pro-duces power based on configuration resistors or with non-volatile memory (NVM) settings without the need for any serial bus communication. This allows easy evalua-tion of the DC/DC converter aspects of the LTC3880. To fully explore the extensive digital power manage-ment features of the parts, download the GUI software All registered trademarks and trademarks are the property of their respective owners.
LTpowerPlay™ onto your PC and use LTC’s I2C/SMBus/PMBus Dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on the fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.
GUI Download
The software can be downloaded from:
http://www.analog.com/en/design-center/ltpower-play
For more digital power system management information and instructions of LTpowerPlay, please visit:
http://www.analog.com/en/products/landing-pages/001/power-systems-management
Design files for this circuit board are available.
PERFORMANCE SUMMARY Specifications are at TA = 25°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 7 12 14 V
VOUT0 Output Voltage Range (1740A-A version) IOUT0 = 0A TO 80A, VIN = 7V to 14V 0.5 1.2 4.096 V
IOUT0 Output Current Range (1740A-A version) 0 80 A
VOUT0 Output Voltage Range (1740A-B version) IOUT0 = 0A TO 20A, VIN = 7V to 14V 0.5 1.5 4.096 V
IOUT0 Output Current Range (1740A-B version) 0 20 A
VOUT1 Output Voltage Range (1740A-B version) IOUT1 = 0A TO 60A, VIN = 7V to 14V 0.5 1.2 4.096 V
IOUT1 Output Current Range (1740A-B version) 0 60 A
FSW Factory Default Switching 425 kHz
EFF Peak Efficiency (-A version) VOUT0 = 1.2V, See Figure 4 88.6 %
2Rev. B
DEMO MANUAL DC1740A
QUICK START PROCEDUREDemonstration circuit 1740A makes it easy to set up to evaluate the performances of the LTC3880. Refer to Figure 2 for proper measurement equipment setup and follow the procedure below:
Note: When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip directly across the C11 or C44. See Figure 3 for proper scope probe technique.
1. Make sure jumpers are in the following positions:
DC1740A-A Version
JUMPER POSITION FUNCTION
JP2 C Tie RUN0 to RUN1
JP3 ON 3.3V for LED indicator
JP4 OFF External VCC for LTC3880-1
JP5 C Tie GPIO0B to GPIO1B
DC1740A-B Version
JUMPER POSITION FUNCTION
JP2 NC Tie RUN0 to RUN1
JP3 ON 3.3V for LED indicator
JP4 OFF External Vcc for LTC3880-1
JP5 NC Tie GPIO0B to GPIO1B
2. With power off, connect the input power supply to VIN and GND. Connect active load to the output.
3. Make sure both RUN switches are OFF.
4. Turn on the power at the input.
Note: Make sure that the input voltage does not exceed 15V.
5. Turn on RUN switches as desired.
6. Check for the correct output voltage from TP15 to TP16 and from TP24 to TP26.
Note. If there is no output, temporarily disconnect the load to make sure that the load is not set too high.
7. Once the proper output voltage is established, adjust the loads within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other parameters.
8. Connect the dongle and control the output voltages from the GUI. See LTpowerPlay Quick Start section for details.
Connecting a PC to DC1740A
You can use a PC to reconfigure the power management features of the LTC3880 such as: nominal VOUT, margin set points, OV/UV limits, temperature fault limits, sequenc-ing parameters, the fault log, fault responses, GPIO and other functionality. The DC1613A dongle may be plugged in regardless of whether or not VIN is present. Dongle can be hot plugged.
3Rev. B
DEMO MANUAL DC1740A
QUICK START PROCEDURE
Figure 1. Demo Setup with PC
Figure 2. Power Test Setup (Dual-Output example)
A
POWER SUPPLY
V
VOUT0 Load
SHUNT V
V
IOUT0
VOUT1 Load V
SHUNT IOUT1
V
4Rev. B
DEMO MANUAL DC1740A
QUICK START PROCEDURECombining DC1740A with Other Digital Power Demo Boards
The DC1740A may be plugged together in a multi-board array with other LTC power system management boards using J7 and J8.
Measuring Efficiency (See Figure 4)
To accurately measure efficiency of any configuration, do the following:
• Remove R103, R111 (bleeder resistors on bottom side of board)
• Set JP3 to OFF to disable the regulator that provides power to various auxiliary demo board components like LEDs.
• Measure VIN across the input ceramic capacitor (C5, C37). Measure VOUT across the output ceramic capacitor (C11, C44).
Evaluating the LTC3880-1
For applications that require the highest possible efficiency, the LTC3880-1 allows the user to supply the bias voltage and gate driver current from an external power supply. Connect the external power supply, 4.8V to 5.2V, to the EXTVCC pin.
To use the onboard LDO to drive INTVCC, make the fol-lowing modifications to the demo board:
• Set JP4 to ON so that U5 provides the 5V drive to INTVCC. U5 takes the place of the external power supply.
• Install R1,R46.
To accurately measure efficiency of a demo board contain-ing the LTC3880-1,
• Drive INTVCC from an external source through the pin named: EXTVCC.
• Set JP3 and JP4 to OFF to disable the LDOs.
• Measure VIN across the input ceramic capacitor (C5, C37). Measure VOUT across the output ceramic capacitor (C11, C44).
Measuring Output Ripple Voltage
An accurate ripple measurement may be performed by using the Figure 3 configuration across C11 or C44.
Figure 3. Measuring Output Voltage Ripple
Figure 4. Typical Efficiency Curves DC1740A-A
Figure 5. Load Transient Waveform DC1740A-A
LOAD CURRENT (A)0
EFFI
CIEN
CY (%
)
80
90
80
3866 G12
70
6020 40 6010 30 50 70
100
75
85
65
95VOUT = 1.5V
VOUT = 1.2V
VIN = 12VFSW = 425kHz
VIN = 12VVOUT = 1.2V
IOUT = 0A TO 40AFSW = 425kHz
IOUT20A/DIV
VOUT50mV/DIV
5Rev. B
DEMO MANUAL DC1740A
LTpowerPlay is a powerful Windows-based development environment that supports Linear Technology power sys-tem management ICs, including the LTC3880, LTC3883, LTC2974 and LTC2978. The software supports a variety of different tasks. You can use LTpowerPlay to evaluate Linear Technology ICs by connecting to a demo board system. LTpowerPlay can also be used in an offline mode (with no hardware present) in order to build a multi-chip configuration file that can be saved and reloaded at a later time. LTpowerPlay provides unprecedented diagnostic and debug features. It becomes a valuable diagnostic tool during board bring-up to program or tweak the power management scheme in a system, or to diagnose power
LTpowerPlay SOFTWARE GUIissues when bringing up rails. LTpowerPlay utilizes the DC1613A USB-to-SMBus controller to communicate with one of many potential targets, including the LTC3880’s DC1740A demo system, or a customer board. The soft-ware also provides an automatic update feature to keep the software current with the latest set of device drivers and documentation. The LTpowerPlay software can be downloaded from:
http://www.analog.com/en/design-center/ltpower-play
To access technical support documents for LTC Digital Power Products visit Help. View online help on the LTpowerPlay menu.
Figure 6. LTpowerPlay Main Interface
6Rev. B
DEMO MANUAL DC1740A
LTpowerPlay QUICK START PROCEDUREThe following procedure describes how to use LTpowerPlay to monitor and change the settings of LTC3880 (taking DC1740A-A as an example).
1. Download and install the LTPowerPlay GUI:
http://www.analog.com/en/design-center/ltpower-play
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC1740A-A. The system tree on the left hand side should look like this:
b. A green message box shows for a few seconds in the lower left hand corner, confirming that the LTC3880s are communicating:
c. In the Toolbar, click the “R” (RAM to PC) icon to read the RAM from the LTC3880. This reads the configuration from the RAM of LTC3880 and loads it into the GUI.
d. If you want to change the output voltage to a different value, like 1.5V. In the Config tab, type in 1.5 in the VOUT_COMMAND box, like this:
Then, click the “W” (PC to RAM) icon to write these register values to the LTC3880.
After finishing this step, you will see the output voltage will change to 1.5V.
If the write is successful, you will see the following message:
e. You can save the changes into the NVM. In the tool bar, click “RAM to NVM” button, as following:
f. Save the demo board configuration to a (*.proj) file. Click the Save icon and save the file. Name it whatever you want.
7Rev. B
DEMO MANUAL DC1740A
PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURE/PART NUMBER
Required Circuit Components—DC1740A-A
1 2 C1, C36 CAP., X5R, 4.7µF,16V, 10%, 0805 MURATA GRM219R61C475KE15D
2 1 C76 CAP., X5R, 4.7µF,16V, 10%, 0603 TDK C1608X5R1C475K
3 6 C2, C40, C20, C34, C53, C67 CAP., X5R, 0.22µF,16V, 10%, 0603 AVX 0603YD224KAT2A
4 2 C72, C78 CAP., X5R, 0.22µF,16V, 10%, 0805 AVX 0805YC224KAT2A
5 2 C3, C69 CAP., OS-CON, 150µF, 16V, 20%, F12 SANYO, 16SVP150M
6 3 C5, C22, C37 CAP., X5R, 10µF,16V, 10%, 1210 TAIYO YUDEN EMK325BJ106KN
7 1 C58 CAP., X5R, 10µF,16V, 10%, 1210 TAIYO YUDEN EMK325BJ106KN
8 1 C75 CAP., X5R, 10µF,16V, 10%, 1206 TAIYO YUDEN EMK316BJ106KD
9 5 C6, C26, C39, C59, C79 CAP., X5R, 100nF,25V, 10%, 0603 AVX 06033C104KAT2A
10 4 C7, C8, C41, C42 CAP., X5R, 1µF, 25V, 10%, 0603 AVX 06033D105KAT2A
11 2 C73, C77 CAP., X5R, 1µF, 16V, 10%, 1206 AVX 1206YD105KAT2A
12 16 C9, C10, C14, C15, C27, C28, C29, C30, C46, C47, C48, C49, C60, C61, C62, C63
CAP., POSCAP 330µF 4V D3L SANYO, 4TPF330M9L
13 12 C11, C12, C13, C31, C32, C33, C43, C44, C45, C64, C65, C66
CAP., X5R, 100µF, 6.3V, 10%,1210 AVX 12106D107AT2A
14 1 C50 CAP., X7R, 4.7nF, 50V, 10%, 0603 NIC NMC0603X7R472K50TRPF
15 4 C18, C19, C51, C52 CAP., X7R, 100pF, 25V, 10%, 0603 AVX 06033C101JAT2A
16 4 C21, C35, C54 ,C68 CAP., X5R, 1µF, 25V, 10%, 0603 AVX 06033D105KAT2A
17 6 C23, C25, C56, C57, C70, C71 CAP., X5R, 10nF,16V, 10%, 0603 AVX 0603YC103KAT2A
18 4 D1, D2, D3, D4 DIODE, SCHOTTKY, SOD-323 CENTRAL CMDSH-3TR
19 4 L1, L2, L3, L4 INDUCTOR, SMT POWER IND. 0.4µH COILCRAFT, XAL1060-401
20 4 Q1-Q4 DUAL N-CHANNEL MOSFET 25V LFPAK FAIRCHILD FDMS3620S
21 1 U1 IC, LTC3880EUJ, QFN 6mm x 6mm ANALOG DEVICES, LTC3880EUJ#PBF
22 1 U2 IC, LTC3880EUJ, QFN 6mm x 6mm ANALOG DEVICES, LTC3880EUJ#PBF
Additional Circuit Components—DC1740A-A
1 2 D5, D6 LED GREEN S-GW TYPE SMD PANASONIC LN1371SGTRP
2 1 D7 LED RED S-TYPE GULL WING SMD PANASONIC LN1271RTR
3 0 Q7, Q9, Q10, Q11, Q12, Q13, Q14, Q16 (OPT) MOSFET SPEED SRS 30V 30A LFPAK
4 4 Q5, Q8, Q15, Q18 TRANS GP SS PNP 40V SOT-23 ON SEMI, MMBT3906LT1G
5 1 Q21 N-CHANNEL 30-V MOSFET,TO-252 VISHAY, SUD50N03-10P-E3
6 3 Q22, Q25, Q26 MOSFET P-CH 20V 0.58A SOT-23 VISHAY TP0101K-T1-E3
7 2 Q23, Q24 MOSFET N-CH 60V 115MA SOT-23 FAIRCHILD 2N7002A
8 0 R1, R46, R126, R128 (OPT) RES., 0805
9 0 R11, R14, R24, R26, R28, R36, R37, R53,R54, R63, R65, R71, R73, R94, R117, R118, R124, R127, R129 (OPT)
RES., 0603
10 29 R2, R3, R10, R16, R20, R22, R25, R27, R30, R45, R47, R48, R50, R52, R55, R8, R59, R61, R64, R66, R67, R68, R75, R89, R90, R95, R129, R77, R79
RES., CHIP, 0Ω, 0603 NIC NRC06ZOTRF
11 5 R109, R115, R116, R119 RES., CHIP, 0Ω, 0805 NIC NRC10ZOTRF
12 1 R41 RES., CHIP, 15k, 1%, 0603 NIC NRC06F1502TRF
13 4 R4, R21, R49, R60 RES., CHIP, 0Ω, 2010 TEPRO(NAKOMA) RN6083
8Rev. B
DEMO MANUAL DC1740A
PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURE/PART NUMBER
14 16 R5, R6, R7, R8, R29, R38, R39, R81, R82, R87, R88, R91, R96, R102, R110, R112
RES., CHIP, 10k, 1%, 0603 NIC NRC06f1002TRF
15 8 R13, R18, R23, R31, R51, R57, R62, R69 RES., CHIP, 1k, 1%, 0603 NIC NRC06F1001TRF
16 2 R56 RES., CHIP, 4.87k, 1%, 0603 NIC NRC06F4871TRF
17 3 R33, R32, R70 RES., CHIP, 20k, 1%, 0603 NIC NRC06F2002TRF
18 3 R34, R35, R72 RES., CHIP, 24.9k, 1%, 0603 NIC NRC06F2492TRF
19 1 R40 RES., CHIP, 11k, 1%, 0603 NIC NRC06F127TRF
20 2 R43, R78 RES., CHIP, 5.76k, 1%, 0603 NIC NRC06F5761TRF
21 3 R120, R121, R122 RES., CHIP, 4.99K, 1%, 0603 NIC NRC06F4991TRF
22 1 R76 RES., CHIP, 12.7k, 1%, 0603 VISHAY CRCW060311K0FKEA
23 2 R100, R101 RES., CHIP, 200Ω, 1%, 0603 NIC NRC06F2000TRF
24 2 R103, R111 RES., CHIP, 0.02Ω, 1%, 2010 VISHAY, WSL2010R020FEA
25 1 R104 RES., CHIP, 127Ω, 1%, 0603 NIC NRC06F1270TRF
26 2 R105,R107 RES., CHIP, 100k, 1%, 0603 NIC NC06F1003TRF
27 1 R106 RES., CHIP, 49.9Ω, 1%, 0603 NIC NRC06F49R9TRF
28 2 R113, R114 RES., CHIP, 10Ω, 1%, 0603 NIC NRC06F10r0TRF
29 3 R9, R85, R86 RES., CHIP, 0Ω, 0603 PANASONIC ERJ-3GEY0R00V
30 0 R12, R19 OPT
31 4 R84, R74, R80, R83 RES., CHIP, 0Ω, 2010 TEPRO(NAKOMA) RN6083
32 0 R15 OPT RES., 0603
33 1 R17 RES., CHIP, 4.87k, 1%, 0603 NIC NRC06F4871TRF
34 1 C16 CAP., X5R, 4.7nF,25V, 10%, 0603 NIC NMC0603X7R472K50TRPF
35 0 C17, OPT
36 0 C74, C80-C86 OPT CAP., 1210
37 0 Q12, Q13, Q14, Q16 OPT MOSFET SPEED SRS LFPAK
38 1 R42 RES., CHIP, 5.76K, 1%, 0603 NIC NRC06F5761TRF
39 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1740A
40 1 R44 RES., CHIP, 0Ω, 0603 PANASONIC ERJ-3GEY0R00V
Hardware—DC1740A-A
1 4 JP2-JP5 0.1" SINGLE ROW HEADER, 3 PIN SAMTEC, TSW-103-07-L-S
2 2 JP2-JP5 SHUNT, 0.1" BLK SAMTEC SNT-100-BK-G
3 4 J1, J2, J9, J11 JACK, BANANA KEYSTONE 575-4
4 2 J3, J4 STUD, TESTPIN PEM KFH-032-10
5 4 J3, J4 (X2) NUT, BRASS 10-32 ANY #10-32
6 2 J3, J4 RING, LUG #10 KEYSTONE #10
7 2 J3, J4 WASHER, TIN PLATED BRASS ANY #10
8 2 J5, J6 CONN, BNC, 5PINS CONNEX, 112404
9 1 J7 CONN SOCKET 20 DUAL ROW RA (F) MILL MAX 803-43-020-20-001
10 1 J8 PIN HEADER 20 DUAL ROW RA (M) MILL MAX 802-43-020-20-001
11 1 J10 CONN HEADER 12POS 2MM STR DL PCB FCI 98414-G06-12ULF
12 1 U4 IC, LDO REG W/SHTDWN 3.3V 8-SOIC ANALOG DEVICES, LT1129CS8-3.3
13 1 U5 IC, LT1129CS8-5, S8 PACKAGE ANALOG DEVICES, LT1129CS8-5
9Rev. B
DEMO MANUAL DC1740A
PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURE/PART NUMBER
14 1 U6 IC, SERIAL EEPROM MICROCHIP 24LC025-I/ST
15 2 SW3,SW4 CONNECTOR, SUB MINIATURE SLIDE SWITCHES
C&K.,JS202011CQN
16 28 TP2-TP16, TP19-TP28, TP30, TP40, TP42 TESTPOINT, TURRET, 0.062" MILL-MAX, 2308-2-00-80-00-00-07-0
17 4 STAND-OFF STAND-OFF, NYLON 0.50" tall KEYSTONE, 8833(SNAP ON)
Required Circuit Components—DC1740A-B
1 2 C1, C36 CAP., X5R, 4.7µF,16V, 10%, 0805 MURATA GRM219R61C475KE15D
2 1 C76 CAP., X5R, 4.7µF,16V, 10%, 0603 TDK C1608X5R1C475K
3 6 C2, C40, C20, C34, C53, C67 CAP., X5R, 0.22µF,16V, 10%, 0603 AVX 0603YD224KAT2A
4 2 C72, C78 CAP., X5R, 0.22µF,16V, 10%, 0805 AVX 0805YC224KAT2A
5 2 C3, C69 CAP., OS-CON, 150µF, 16V, 20%, F12 SANYO, 16SVP150M
6 3 C5, C22, C37 CAP., X5R, 10µF,16V, 10%, 1210 TAIYO YUDEN EMK325BJ106KN
7 1 C58 CAP., X5R, 10µF,16V, 10%, 1210 TAIYO YUDEN EMK325BJ106KN
8 1 C75 CAP., X5R, 10µF,16V, 10%, 1206 TAIYO YUDEN EMK316BJ106KD
9 5 C6, C26, C39, C59, C79 CAP., X5R, 100nF,25V, 10%, 0603 AVX 06033C104KAT2A
10 4 C7, C8, C41, C42 CAP., X5R, 1µF, 25V, 10%, 0603 AVX 06033D105KAT2A
11 2 C73, C77 CAP., X5R, 1µF, 16V, 10%, 1206 AVX 1206YD105KAT2A
12 16 C9, C10, C14, C15, C27, C28, C29, C30, C46, C47, C48, C49, C60, C61, C62, C63
CAP., POSCAP 330µF 4V D3L SANYO, 4TPF330M9L
13 12 C11, C12, C13, C31, C32, C33, C43, C44, C45, C64, C65, C66
CAP., X5R, 100µF, 6.3V, 10%,1210 AVX 12106D107AT2A
14 1 C50 CAP., X7R, 4.7nF, 50V, 10%, 0603 NIC NMC0603X7R472K50TRPF
15 4 C18, C19, C51, C52 CAP., X7R, 100pF, 25V, 10%, 0603 AVX 06033C101JAT2A
16 4 C21, C35, C54, C68 CAP., X5R, 1µF, 25V, 10%, 0603 AVX 06033D105KAT2A
17 6 C23, C25, C56, C57, C70, C71 CAP., X5R, 10nF,16V, 10%, 0603 AVX 0603YC103KAT2A
18 4 D1, D2, D3, D4 DIODE, SCHOTTKY, SOD-323 CENTRAL CMDSH-3TR
19 4 L1, L2, L3, L4 INDUCTOR, SMT POWER IND. 0.4uH COILCRAFT, XAL1060-401
20 4 Q1-Q4 DUAL N-CHANNEL MOSFET 25V LFPAK FAIRCHILD FDMS3620S
21 1 U1 IC, LTC3880EUJ, QFN 6mm x 6mm ANALOG DEVICES, LTC3880EUJ#PBF
22 1 U2 IC, LTC3880EUJ, QFN 6mm x 6mm ANALOG DEVICES, LTC3880EUJ#PBF
Additional Circuit Components—DC1740A-B
1 2 D5, D6 LED GREEN S-GW TYPE SMD PANASONIC LN1371SGTRP
2 1 D7 LED RED S-TYPE GULL WING SMD PANASONIC LN1271RTR
3 0 Q7, Q9, Q10, Q11, Q12, Q13, Q14, Q16 (OPT) MOSFET SPEED SRS 30V 30A LFPAK
4 4 Q5, Q8, Q15, Q18 TRANS GP SS PNP 40V SOT-23 ON SEMI, MMBT3906LT1G
5 1 Q21 N-CHANNEL 30-V MOSFET,TO-252 VISHAY, SUD50N03-10P-E3
6 3 Q22, Q25, Q26 MOSFET P-CH 20V 0.58A SOT-23 VISHAY TP0101K-T1-E3
7 2 Q23, Q24 MOSFET N-CH 60V 115MA SOT-23 FAIRCHILD 2N7002A
8 0 R1, R46, R126, R128 (OPT) RES., 0805
9 0 R11, R14, R24, R26, R28, R36, R37, R53, R54, R63, R65, R71, R73, R94, R117, R118, R124, R127, R129(OPT)
RES., 0603
10Rev. B
DEMO MANUAL DC1740A
PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURE/PART NUMBER
10 29 R2, R3, R10, R16, R20, R22, R25, R27, R30, R45, R47, R48, R50, R52, R55, R58, R59, R61, R64, R66, R67, R68, R75, R89, R90, R95, R129, R77, R79
RES., CHIP, 0Ω, 0603 NIC NRC06ZOTRF
11 5 R109, R115, R116, R119 RES., CHIP, 0Ω, 0805 NIC NRC10ZOTRF
12 1 R41 RES., CHIP, 15k, 1%, 0603 NIC NRC06F1502TRF
13 4 R4, R21, R49, R60 RES., CHIP, 0Ω, 2010 TEPRO(NAKOMA) RN6083
14 16 R5, R6, R7, R8, R29, R38, R39, R81, R82, R87, R88, R91, R96, R102, R110, R112
RES., CHIP, 10k, 1%, 0603 NIC NRC06f1002TRF
15 8 R13, R18, R23, R31, R51, R57, R62, R69 RES., CHIP, 1k, 1%, 0603 NIC NRC06F1001TRF
16 2 R56 RES., CHIP, 4.87k, 1%, 0603 NIC NRC06F4871TRF
17 3 R33, R32, R70 RES., CHIP, 20k, 1%, 0603 NIC NRC06F2002TRF
18 3 R34, R35, R72 RES., CHIP, 24.9k, 1%, 0603 NIC NRC06F2492TRF
19 1 R40 RES., CHIP, 11k, 1%, 0603 NIC NRC06F127TRF
20 2 R43, R78 RES., CHIP, 5.76k, 1%, 0603 NIC NRC06F5761TRF
21 3 R120, R121, R122 RES., CHIP, 4.99k, 1%, 0603 NIC NRC06F4991TRF
22 1 R76 RES., CHIP, 12.7k, 1%, 0603 Vishay CRCW060311K0FKEA
23 2 R100, R101 RES., CHIP, 200Ω, 1%, 0603 NIC NRC06F2000TRF
24 2 R103, R111 RES., CHIP, 0.02Ω, 1%, 2010 VISHAY, WSL2010R020FEA
25 1 R104 RES., CHIP, 127Ω, 1%, 0603 NIC NRC06F1270TRF
26 2 R105, R107 RES., CHIP, 100k, 1%, 0603 NIC NC06F1003TRF
27 1 R106 RES., CHIP, 49.9Ω, 1%, 0603 NIC NRC06F49R9TRF
28 2 R113, R114 RES., CHIP, 10Ω, 1%, 0603 NIC NRC06F10r0TRF
29 0 R9, R85, R86 OPT RES., 0603
30 2 R12, R19 RES., CHIP, 0Ω, 0603 PANASONIC ERJ-3GEY0R00V
31 0 R84, R74, R80, R83 OPT RES., CHIP, 2010 TEPRO(NAKOMA) RN6083
32 0 R15, OPT
33 1 R17 RES., CHIP, 10k, 1%, 0603 NIC NRC06F4871TRF
34 1 C16 CAP., X5R, 10nF, 25V, 10%, 0603 MURATA GRM18BR71E103KA37D
35 0 C17, OPT
36 0 C74, C80-C86 OPT CAP., 1210
37 0 Q12, Q13, Q14, Q16 OPT MOSFET SPEED SRS LFPAK
38 1 R42 RES., CHIP, 7.32k, 1%, 0603 VISHAY.,CRCW060311K3FKEA
39 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1740A
40 0 R44, OPT
11Rev. B
DEMO MANUAL DC1740A
PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURE/PART NUMBER
Hardware—DC1740A-B
1 4 JP2-JP5 0.1" SINGLE ROW HEADER, 3 PIN SAMTEC, TSW-103-07-L-S
2 2 JP2-JP5 SHUNT, 0.1" BLK SAMTEC SNT-100-BK-G
3 4 J1, J2, J9, J11 JACK, BANANA KEYSTONE 575-4
4 2 J3, J4 STUD, TESTPIN PEM KFH-032-10
5 4 J3, J4 (X2) NUT, BRASS 10-32 ANY #10-32
6 2 J3, J4 RING, LUG #10 KEYSTONE #10
7 2 J3, J4 WASHER, TIN PLATED BRASS ANY #10
8 2 J5, J6 CONN, BNC, 5PINS CONNEX, 112404
9 1 J7 CONN SOCKET 20 DUAL ROW RA (F) MILL MAX 803-43-020-20-001
10 1 J8 PIN HEADER 20 DUAL ROW RA (M) MILL MAX 802-43-020-20-001
11 1 J10 CONN HEADER 12POS 2MM STR DL PCB FCI 98414-G06-12ULF
12 1 U4 IC, LDO REG W/SHTDWN 3.3V 8-SOIC ANALOG DEVICES, LT1129CS8-3.3
13 1 U5 IC, LT1129CS8-5, S8 PACKAGE ANALOG DEVICES, LT1129CS8-5
14 1 U6 IC, SERIAL EEPROM MICROCHIP 24LC025-I/ST
15 2 SW3, SW4 CONNECTOR, SUB MINIATURE SLIDE SWITCHES
C&K.,JS202011CQN
16 28 TP2-TP16, TP19-TP28, TP30,TP40, TP42 TESTPOINT, TURRET, 0.062" MILL-MAX, 2308-2-00-80-00-00-07-0
17 4 STAND-OFF STAND-OFF, NYLON 0.50" tall KEYSTONE, 8833(SNAP ON)
12Rev. B
DEMO MANUAL DC1740A
SCHEMATIC DIAGRAM5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
SGND
AND
PGN
D CO
NNEC
TED
ATA
SING
LE N
ODE
NEAR
U1
7V -
14V
35V
**
2. IN
STAL
L SH
UNTS
AS
SHOW
N.
1. A
LL R
ESIS
TORS
ARE
IN O
HMS,
060
3.
ALL
CAP
ACIT
ORS
ARE
IN M
ICRO
FARA
DS, 0
603.
NOTE
: UNL
ESS
OTHE
RWIS
E SP
ECIF
IED
2512
2512
PLAC
E Q5
,Q6
NEAR
L2,L
1. RE
SPEC
TIVE
LY
D3L
D3L
D3L
D3L
D3L
D3L
D3L
D3L
ADDR
ESS:
0x4
8
*
OPT
*
*
*
* * **
**
OPTI
ONAL
FOR
DISC
RETE
MOS
FET
JP5
Vout
0 / Io
ut0
ASSY
-A -B1.2
V / 1
00A
1.5V
/ 25A
Fsw
425k
HzR9
,R85
,R86
0 OPT
R12,R
19OP
T 0
Vout
1 / Io
ut1
1.5V
/ 75A
425k
Hz
4.7nF
4.7nF
4.7nF
R17
JP2
OPT 0
0 OPT
R84,R
74,R
80,R
834.7
nFC1
74.8
7KR1
5C1
6"C
""N
C"4.8
7K"N
C""C
"
*
*
VDD25-1
INTV
CC-1
VIN
VDD3
3-1
VDD3
3-1
VDD3
3-1
VDD3
3-1
VOUT
1
VOUT
0
VIN
VDD2
5-1
VIN
VIN
VIN
SCL
SDA
SYNC
ALER
TB
GPIO
0BGP
IO1B
SCRUN1
RUN0
EXTV
CC_D
RVVI
N
VSEN
SE+
ITH1
VSEN
SE+
VSEN
SE-
INTV
CC-1
TG0-
1
SW0-
1
BG0-
1
TG1-
1
SW1-
1
BG1-
1
SW1-
1
TG1-
1
BG1-
1
SW0-
1
TG0-
1
BG0-
1
REVI
SION
HIS
TORY
DESC
RIPT
ION
DATE
APPR
OVED
ECO
REV
YI S
.1s
t PRO
TOTY
PE1
3-23
-12
__
REVI
SION
HIS
TORY
DESC
RIPT
ION
DATE
APPR
OVED
ECO
REV
YI S
.1s
t PRO
TOTY
PE1
3-23
-12
__
REVI
SION
HIS
TORY
DESC
RIPT
ION
DATE
APPR
OVED
ECO
REV
YI S
.1s
t PRO
TOTY
PE1
3-23
-12
__
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e:(4
08)4
32-1
900
1630
McC
arth
y Bl
vd.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
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y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Tues
day,
June
13, 2
017
14
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e:(4
08)4
32-1
900
1630
McC
arth
y Bl
vd.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Tues
day,
June
13, 2
017
14
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e:(4
08)4
32-1
900
1630
McC
arth
y Bl
vd.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Tues
day,
June
13, 2
017
14
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
C23
10nF
R18
1K
C80
10uF
TP6
VIN
C5 10uF
D12 1
R42
R35
24.9
K
+C3
0
330u
F
R34
24.9
K
L1
0.4u
H
TP2
VDD3
3-1
R7 10K
C12
100u
F
R25 0
C8 1uF
R86
R6 10K
R33
20K
R23
1K
+C2
9
330u
F
R12
R85
L20.
4uH
R39
10K
J11
GND
Q8
MMBT3906LT1G
+C2
8
330u
F
C17
R22 0
R29
10K
C13
100u
FR1
4OP
T
R30
0
Q10
12
53
4
TP5
INT/
EXTV
CC-1
J9VO
UT0
+C2
7
330u
F
R5 10K
J1VI
N
R11
OPT
C18
100p
FC2
00.
22uF
R27
0
+C1
033
0uF
R9
R37
OPT
R41
15K
C610
0nF
R30
C31
100u
F
Q7
12
53
4
+C3 15
0uF
TP16
VOUT
O-
+C1
533
0uF
R21
0
C11
100u
F
J2GN
D
C35
1uF
C33
100u
F
C19
100p
FR1
7
PHASE
Q2FD
MS3
600S
1
2
5
3
4
6
7
8
9
C16
TP3VD
D25-
1
Q11
12
53
4
R31
1K
C7 1uF
D2
2 1
R43
5.76
K
C22
10uF
Q5
MMBT3906LT1G
C34
0.22
uF
C26
100n
F
PHASE
Q1FD
MS3
600S
1
2
5
3
4
6
7
8
9
R45 0
R1OP
T
C21
1uF
U1LT
C388
0EUJ VS
ENSE
0+1
VSEN
SE0-
2
ISNS
1+3
ISNS
1-4
ITH0
5
ISNS
0+6
ISNS
0-7
SYNC
8
SCL
9
SDA
10
ALER
T11
GPIO
012
GPIO
113
RUN0
14RU
N115
ASEL
16
FREQ
_CFG
17
VOUT
0_CF
G18
VOUT
1_CF
G19
VTRI
M0_
CFG
20
VTRI
M1_
CFG
21
VDD2522
WP
23
SC24
VDD3325
ITH1
26
VSEN
SE1
27
TSNS
128
SW1
29
TG1
30
BOOS
T131
BG1
32
INTVCC33
PGND 34
VIN35
BG0
36
BOOS
T037
TG0
38
SW0
39
TSNS
040
GND 41
R32
20K
R16
0
R44 0
Q9
12
53
4
+C9 330u
FR1
0 0
TP4GN
D
R19
R80
+C1
433
0uF
C32
100u
F
R13
1K
R22
C25
10nF
R74
TP15
VOUT
O+
C81
10uF
R15
R36
OPT
R40
R83
+C6
915
0uF
R8 10K
R20
0
C74
10uF
TP9
GND
R84
C82
10uF
R24
OPT
R40
11K
R26
OPT
R38
10K
C2 0.22
uF
C1 4.7u
F
R28
OPT
13Rev. B
DEMO MANUAL DC1740A
SCHEMATIC DIAGRAM5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
PLAC
E Q1
5,Q18
NEA
R L4
,L3.
RESP
ECTI
VELY
2512
2512
SGND
AND
PGN
D CO
NNEC
TED
ATA
SING
LE N
ODE
NEAR
U1
D3L
D3L
D3L
D3L
D3L
D3L
D3L
D3L
1.5V
/ 75A
ADDR
ESS:
0x4
90 0
OPTI
ONAL
FOR
DISC
RETE
MOS
FET
VDD25-2
VIN
VDD2
5-2
VDD3
3-2
VIN
VIN
VOUT
1
VDD3
3-2
VDD3
3-2
VIN
VIN
SYNC AL
ERTB
EXTV
CC_D
RV
RUN1
GPIO
1B
SCL
SDA
SC
VSEN
SE+
VSEN
SE-
ITH1VI
NSW
0-2
BG0-
2
TG0-
2
TG1-
2SW
1-2
BG1-
2
SW0-
2
TG0-
2
BG0-
2
SW1-
2
TG1-
2
BG1-
2
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e:(4
08)4
32-1
900
1630
McC
arth
y Bl
vd.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Wedn
esda
y, Ju
ne 14
, 201
72
4
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e:(4
08)4
32-1
900
1630
McC
arth
y Bl
vd.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Wedn
esda
y, Ju
ne 14
, 201
72
4
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e:(4
08)4
32-1
900
1630
McC
arth
y Bl
vd.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Wedn
esda
y, Ju
ne 14
, 201
72
4
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
C45
100u
F
R64
0
R48
0
TP21VD
D33-
2
R56
4.87
K
C54
1uF
C64
100u
F
R46
OPT
R79
0
R95 0
R62 1K
Q12
12
53
4
R96
10K
R72
24.9
K
R50
0
TP20GN
D
TP19VD
D25-
2
R55
0
J3VO
UT1
L4 0.4u
H
R47
2
Q14
12
53
4+C4
733
0uF
R57
1K
C68
1uF
R59
0
C58
10uF
J4GN
D
Q13
12
53
4Q1
6
12
53
4
+C4
633
0uF
Q15
MMBT3906LT1G
C39
100n
F
R54
OPT
R53
OPT
TP26 VO
UT1-
R73
OPT
R51
1K
D42 1
C42
1uF
R77
R89
0
TP22
INT/
EXTV
CC-2
C83
10uF
Q18
MMBT3906LT1G
R61
0
C85
10uF
D32 1
C59
100n
F
R65
OPT
R63
OPT
PHASE
Q4FD
MS3
600S
1
2
5
3
4
6
7
8
9
C41
1uF
R60
0
C44
100u
F
C86
10uF
C67
0.22
uF
+C6
033
0uF
R49
0
C84
10uF
R66
0
C65
100u
F
C43
100u
F
+C6
333
0uF
C40
0.22
uF
C52
100p
F
R76
12.7
K
U2LT
C388
0EUJ VS
ENSE
0+1
VSEN
SE0-
2
ISNS
1+3
ISNS
1-4
ITH0
5
ISNS
0+6
ISNS
0-7
SYNC
8
SCL
9
SDA
10
ALER
T11
GPIO
012
GPIO
113
RUN0
14RU
N115
ASEL
16
FREQ
_CFG
17
VOUT
0_CF
G18
VOUT
1_CF
G19
VTRI
M0_
CFG
20
VTRI
M1_
CFG
21
VDD2522
WP
23
SC24
VDD3325
ITH1
26
VSEN
SE1
27
TSNS
128
SW1
29
TG1
30
BOOS
T131
BG1
32
INTVCC33
PGND 34
VIN35BG
036
BOOS
T037
TG0
38
SW0
39
TSNS
040
GND 41
R68
0
L3
0.4u
H
PHASE
Q3FD
MS3
600S
1
2
5
3
4
6
7
8
9
C50
4.7n
F
R75
0
C36
4.7u
F
+C6
233
0uF
C66
100u
F
C57
10nF R7
1
R69
1K
+C4
933
0uF
R90
0
+C6
133
0uF
C53
0.22
uF
TP24 VO
UT1+
R67
0
R70
20K
R94
OPT
R52 0
R91
10K
R58
0
R78
5.76
K
C56
10nF
C37
10uF
+C4
833
0uF
C51
100p
F
14Rev. B
DEMO MANUAL DC1740A
SCHEMATIC DIAGRAM5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
NOTE
:PU
LSE
OUT
10m
V / A
MP
DYNA
MIC
LOAD
CIR
CUIT
VOUT
LED
ON OFF
EXTV
CC_D
RV
ON OFF
GPIO
1GP
IO0
ALER
T
IOUT
TES
T
VOUT
1
+3.3
V
VIN
VIN
+3.3
V+3
.3V
+3.3
V
3V3
VDD3
3-1
VIN
3V3
VDD3
3-2
VIN
EXTV
CC_D
RV
GPIO
0BGP
IO1B
ALER
TB
VIN
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 9
5035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Tues
day,
June
13, 2
017
34
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 9
5035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Tues
day,
June
13, 2
017
34
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 9
5035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Tues
day,
June
13, 2
017
34
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
R103
0.02
D5GR
EEN
U4
LT11
29CS
8-3.
3OU
TPUT
1SE
NSE/
ADJ
2GN
D3
NC4
SHDN
5
GND
6
GND
7
VIN
8
Q26
TP01
01K
23
1
J61
2345
Q25
TP01
01K
23
1
R101
200
C72
0.22
uF
R105
100K
D7RE
D
C78
0.22
uF
C77
1uF
R106
50
R104
127
C76
4.7u
F
J51
2345
D6GR
EEN
Q24
2N70
02A
23
1
JP4
1
2
3
TP40
PULS
E IN
Q21
SUD5
0N03
-10C
P-E3
1
23
TP42
GND JP
3 1
2
3
C73
1uF
R87
10K
R100
200
R102
10K
R81
10K
Q22
TP01
01K
2 3
1
U5
LT11
29CS
8-5
OUTP
UT1
SENS
E/AD
J2
GND
3NC
4SH
DN5
GND
6
GND
7
VIN
8
C75
10uF
R88
10K
R111
0.02
Q23
2N70
02A
23
1
R82
10K
R107
100K
15Rev. B
DEMO MANUAL DC1740A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
SCHEMATIC DIAGRAM5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
TO D
C161
3A
ALL
PA
RTS
ON
TH
IS P
AG
E A
RE
FO
R D
EM
O O
NLY
, NO
T N
EE
DE
D IN
CU
STO
ME
R D
ES
IGN
ON
OF
F
ON
OF
F
RUN0
RUN1
CNC
GPIO
0-GP
IO1
RUN0
-RUN
1NC
C
SH
AR
E_C
LK
FAU
LT1
FAU
LT3
SY
NC
_C
AU
XV
CC
EE
WP
EE
SD
A
EE
SC
L
FAU
LT2
VDD3
3-1
3V3
VDD3
3-2
3V3
ALER
TBSD
ASC
L
RUN0
RUN1
GPIO
1B
GPIO
0BSY
NC SC
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 9
5035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Tues
day,
June
13, 2
017
44
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 9
5035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Tues
day,
June
13, 2
017
44
POLY
PHA
SE D
C/D
C C
ON
VER
TER
WIT
H D
IGIT
AL
PWR
MA
NA
GEM
ENT
HZ YI S
.
N/A
LTC3
880E
UJ F
AMIL
YDE
MO C
IRCU
IT 17
40A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 9
5035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY.
CONT
ACT
LINE
ARTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MATI
C
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
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16Rev. B
DEMO MANUAL DC1740A
ANALOG DEVICES, INC. 2013–2018
10/18www.analog.com
ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.